Cached registry value and restored environment variable check

Author: chris-steele

lib/Constants.js

@@ -18,6 +18,8 @@ module.exports = {
     getRegistry:getRegistry
 };
 
+var registry = null;
+
 function searchForHome() {
     var locations = [
             process.env.HOME,
@@ -31,11 +33,21 @@ function searchForHome() {
 }
 
 function getRegistry() {
-    if (fs.existsSync('./.bowerrc')) {
+    if (registry !== null) {
+        return registry;
+    }
+
+    if (process.env.ADAPT_REGISTRY) {
+        registry = process.env.ADAPT_REGISTRY;
+
+    } else if (fs.existsSync('./.bowerrc')) {
         // a manifest exists; let bower determine the registry
-        return;
+        registry = undefined;
+        
+    } else {
+        // use the default Adapt registry
+        registry = 'http://adapt-bower-repository.herokuapp.com/';
     }
 
-    // use the default Adapt registry
-    return 'http://adapt-bower-repository.herokuapp.com/';
+    return registry;
 }